一、引言本组从1958年12月开始,在东北地区,南至旅大区(金县)、盖平、熊岳、海域和黑龙江省的密山、勃利、穆棱、肇东、庆安、宁安、哈尔滨等地,从不同耕地中采取土壤样品,进行抗生菌菌种分离,共分离出来1,100号放线菌。将这些菌种进行纯分离之后,对小麦根瘤病、小麦赤霉病、亚麻炭疽病、亚麻立枯病和白菜软腐病等进行了抗生力试验。从一千多号的放线菌菌种中,选出了对上述植物病害有较强的拮抗力。的八个 I. INTRODUCTION This group started from December 1958 in the northeast area, south to Luda District (Jinxian), Gaiping, Xiong Yue, sea areas and Mishan, Boli, Muling, Zhaodong and Qing in Heilongjiang Province An, Ning’an, Harbin and other places, soil samples taken from different cultivated areas were isolated from antibacterial strains, isolated from Actinomyces No. 1,100. After pure isolation of these strains, antibacterial tests were carried out on wheat root nodule disease, wheat scab, flax anthracnose, flax blight and soft rot of cabbage. From more than a thousand actinomycetes strains, the plant disease has been selected to have a stronger antagonism. Eight